During the Tang dynasty, the development of new kinds of rice and improved irrigation methods led to

improved irrigation methods, which increased crop growth, 2. developed new kinds of rice which grew well in unfertile soil. They were able to increase rice production.

Explanation:

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united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

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